Differences of Resistance Measurement Methods

QThere are two types of resistance measurement methods: DC method and AC method. Which should be chosen?


The choice of either DC or AC method is determined by the object to be measured. See the table for each of the  advantages and disadvantages.

DC Resistance Meter AC Resistance Meter
Measurement signal
Detection voltage
See below Figure 1 See below Figure 2
Advantage High-precision measurement is possible. Not affected by EMF.
Can measure reactance.
Disadvantages Influenced by electromotive force due to lack of DC superimposed measurement.
(OVC function allows correction of only thermal EMF)
Difficult to improve accuracy
Purpose DC resistance, contact resistance, and insulation resistance of transformers, motors, and other windings, and wiring resistance of PCBs Battery impedance, inductor, capacitor, and electrochemical measurements
Measuring range 10-8 to 1016 Ω 10-3 to 108 Ω
Hioki measuring instruments Resistance Meters
Digital Multimeters, Testers
Insulation Testers(MΩ HiTester)
Battery Testers
Impedance Analyzers
LCR Meters

Figure 1

Figure 2